/*
 * Created on 11-Oct-2004
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.core3.util;

/**
 * @author parg
 *
 */

import java.util.HashMap;
import java.util.Map;

import org.gudy.azureus2.core3.logging.LogEvent;
import org.gudy.azureus2.core3.logging.LogIDs;
import org.gudy.azureus2.core3.logging.Logger;

public class UnresolvableHostManager {
    // sometimes we need an IP address for a host in order to function (for example, when banning
    // peers) but the name we have got a host is unresolvable (for whatever reason, e.g. its the
    // name of an TOR hidden service). Here we map such hosts onto class E (i.e. experimental) IP
    // addresses so things mainly work

    protected static int next_address = 0xf0000000 + RandomUtils.nextInt(0x00ffffff);

    protected static Map host_map = new HashMap();

    public static int getPseudoAddress(String str) {
        synchronized (host_map) {

            Integer res = (Integer) host_map.get(str);

            if (res == null) {

                res = new Integer(next_address++);

                if (Logger.isEnabled())
                    Logger.log(new LogEvent(LogIDs.NET, "Allocated pseudo IP address '" + Integer.toHexString(res.intValue()) + "' for host '"
                            + str + "'"));

                host_map.put(str, res);
            }

            return (res.intValue());
        }
    }

    public static boolean isPseudoAddress(String str) {
        synchronized (host_map) {

            return (host_map.get(str) != null);
        }
    }
}
